Study And Application Om Copper-based Catalyst Characteristic Based On Sample Test

The problem of air pollution has been troubling the healthy development of China's economy.With the imminent introduction of the six national laws,major automobile enterprises,internal combustion engine enterprises and universities are constantly carrying out more in-depth research in the field of reprocessing.lt is well known that diesel engines produce a large amount of NOx gas due to their high combustion temperature.This is the main pollutant causing acid rain and photochemical smog.For NOx reduction,Urea_SCR systems are currently popular.In this paper,NH3 adsorption process in this reaction process will be studied and analyzed.Based on reaction kinetics principle,according to the internal structure of small sample test rig,honeycomb coating structure of catalyst,reaction mechanism and NH3-SCR,shrinkage pipe flow model was established,respectively,a model of single channel of laminar flow,a one-dimensional steady-state convective boundary layer diffusion model,a one-dimensional unsteady convection diffusion model,the more active point of adsorption model.A 1+1-dimensional steady-state flow ammonia storage model was established through the above model.In order to predict the properties of catalyst,ammonia storage model is presented to solve the inverse problem method is put forward,in order to avoid reduce to optimize parameters fall into local optimal solution,using the global search ability of genetic algorithm,and considering the high computational complexity of forward problem,add a new function in genetic algorithm(ga)to select,genetic algorithm is used to reduce the offspring of atavism.Considering the diversity of portable platform,language readability and compatibility of other computer languages,this paper decided to adopt the open source programming tool Python,and use its massive toolkit to build the implementation model,as well as the implementation of improved genetic algorithm.The activation energies and correction coefficients of the three active sites S1,S2 and S3 as well as the porosity and storage of the coating layer of the catalyst itself were reversely solved,so as to obtain various parameters of the current catalyst and verify its feasibility by comparison with experimental data.On this basis,the 1+1-dimensional ammonia storage model was used to simulate its characteristics and comprehensively evaluate the catalyst performance.In the process of using catalyst,aging problem is inevitable because of various objective factors.This paper verifies the accuracy of the model for ammonia storage after aging.On this basis,the aging problem can also be analyzed.